Symmetry breaking indication for supergravity inflation in light of the Planck 2015

CORC > 理论物理研究所 > 中国科学院理论物理研究所 > 理论物理所科研产出 > 理论物理所1978-2010年知识产出

	Symmetry breaking indication for supergravity inflation in light of the Planck 2015
	Li, TJ; Li, ZJ; Nanopoulos, DV
刊名	JOURNAL OF COSMOLOGY AND ASTROPARTICLE PHYSICS
	2015
期号	9 页码:6
关键词	inflation supersmmetry and cosmology particle physics - cosmology connection
通讯作者	Li, TJ (reprint author), Chinese Acad Sci, State Key Lab Theoret Phys, Inst Theoret Phys, Beijing 100190, Peoples R China.
英文摘要	Supergravity (SUGRA) theories with exact global U(1) symmetry or shift symmetry in Kahler potential provide natural frameworks for inflation. However, quadratic inflation is disfavoured by the new results on primordial tensor fluctuations from the Planck Collaboration. To be consistent with the new Planck data, we point out that the explicit. symmetry breaking is needed, and study these two SUGRA inflation in detail. For SUGRA inflation with global U(1) symmetry, the symmetry breaking term leads to a trigonometric modulation on inflaton potential. Coefficient of the U(1) symmetry breaking term is of order 10(-2), which is sufficient large to improve the inflationary predictions while its higher order corrections are negligible. Such models predict sizeable tensor fluctuations and highly agree with the Planck results. In particular, the model with a linear U(1) symmetry breaking term predicts the tensor-to-scalar ratio around r similar to 0.01 and running spectral index alpha(s) similar to -0.004, which comfortably fit with the Planck observations. For SUGRA inflation with breaking shift symmetry, the inflaton potential is modulated by an exponential factor. The modulated linear and quadratic models are consistent with the Planck observations. In both types of models the tensor-to-scalar ratio can be of order 10(-2) which will be tested by the near future observations.
学科主题	Astronomy & Astrophysics ; Physics
类目[WOS]	Astronomy & Astrophysics ; Physics, Particles & Fields
关键词[WOS]	NO-SCALE SUPERGRAVITY ; NATURAL INFLATION ; CHAOTIC INFLATION ; CONSTRAINTS ; FLATNESS ; UNIVERSE ; HORIZON
收录类别	SCI
语种	英语
内容类型	期刊论文
源URL	[http://ir.itp.ac.cn/handle/311006/20874]
专题	理论物理研究所_理论物理所1978-2010年知识产出
推荐引用方式 GB/T 7714	Li, TJ,Li, ZJ,Nanopoulos, DV. Symmetry breaking indication for supergravity inflation in light of the Planck 2015[J]. JOURNAL OF COSMOLOGY AND ASTROPARTICLE PHYSICS,2015(9):6.
APA	Li, TJ,Li, ZJ,&Nanopoulos, DV.(2015).Symmetry breaking indication for supergravity inflation in light of the Planck 2015.JOURNAL OF COSMOLOGY AND ASTROPARTICLE PHYSICS(9),6.
MLA	Li, TJ,et al."Symmetry breaking indication for supergravity inflation in light of the Planck 2015".JOURNAL OF COSMOLOGY AND ASTROPARTICLE PHYSICS .9(2015):6.